Blacklist Patrol
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Blacklist Patrol
You're notified daily by email of any blacklists your server is found on.
The Spamhaus Project
Spamhaus is a realtime blacklist of servers and networks that are either major spammers, or have known problems with being exploited by hackers (and hence are either security risks, and or spam sources.)
It also features the Register Of Known Spam Operations (ROKSO) - which maintains information on 200 different known spammers - responsible for approximately 90% of spam.
Spamhaus can either be used manually to look up information, or programmatically by spam blocker software such as SpamButcher.
To make SpamButcher's spam email blocker use Spamhaus set your SMTP blacklist to sbl.spamhaus.org.